180180243538 has 16 divisors (see below), whose sum is σ = 272341448064. Its totient is φ = 89401557600.

The previous prime is 180180243533. The next prime is 180180243553. The reversal of 180180243538 is 835342081081.

It is a super-2 number, since 2×180180243538² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 180180243494 and 180180243503.

It is not an unprimeable number, because it can be changed into a prime (180180243533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248070 + ... + 649537.

It is an arithmetic number, because the mean of its divisors is an integer number (17021340504).

Almost surely, 2^180180243538 is an apocalyptic number.

180180243538 is a deficient number, since it is larger than the sum of its proper divisors (92161204526).

180180243538 is a wasteful number, since it uses less digits than its factorization.

180180243538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898377.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 180180243538 in words is "one hundred eighty billion, one hundred eighty million, two hundred forty-three thousand, five hundred thirty-eight".